Pneumatic valve action



9, 1929. c, F, STODDARb 1.720.405.

PNEUMATIC VALVE ACTION Filed May 12, 1924 anomtoz Char/es F J/oaoard 351Glue rm 45; M ,ZM

7 CHARLES valve port 5 3Y1 Patented July 9, 1929.

1 {fearless fi p... ex W actions" for automatic gmilsic'al instiuintntjs"and has as one of: its" tlie"j 1'ovisi0n of an iniprived pneumatic,st'ruct'ure,' and niethod ojf 1an ,t11 e saqie. Other and more specific'ob ec-ts and advan; tages of .the invention appear liereiirafter. 'f AP red e ii oflii nfi fi w ve gn s l c fe ur e Of. li e iifife 'i i b vnin the cc mp pyi gdrawings in which, Figuregl is sgttgqnal 'vi'efay' ofa valve aci'befly fl t iiiitet e1QT i i i I was i iv, shewifl h p efi emew weaved). r

' -Fi;;1. 3 1% mm e n lr j g emi i c showing the VIGWS p u h Structu Fgure as 111 3, 9 aki j he lusti' 'zttedfiii Figiires 1 an d Q, H vieivoi the' asseiribled pouch previous to; insertion j th jralyef action shw nFig ires efi' i f i 4. iI- v1 Figure 8 is an inverted plain vexvofthe assembled I pouch with the .n embi flattened as' u e- I R f ingt h dm rinssaiffllw. e ent 'o has been illustrated as applied toaipn'eumatie valveaction vof th'e',outside 'rvalve'type, although aswill appearto those skilled inth'e m f s u p ib e f im l ati n i s swstr;uc'tu1'es;otl 1'er than that In the dra vili gs'an exha-ustgchestillustrated, formed bgl'l jfifl. the v and, ar s? and 3 which aresepf'rated suitable strips 4. The' up p en board provided; witha ed tocooperate, the up er an d'loyver faces of t b e 'd 2 erving a seese e seads my bf? l j fll' d k 1 f lQPs "l, 91 other suitable inateiji l fltonsure flairt ght Contact. The upper board? also I ,provi'ded with apassage 8 communicating with theport 5 through ivhic'h; asuitablepneuniatie device may be connected to either atiri'osfihe're erenhaust under control of the valve 6 for actuationin the usual manner.

Instead of the usual dia ihrhgin for actuating the valve 6, theapparatus of the present invention is provided with a pouch 10 oil thin,light. flexible material such as very thin intestinal membrane. In thepreferred form of the invention the thickness of this mate-- rial shouldnot substantially exceed a few thousandths of an inch, and it has beenfound that material on! one thousandth of an inch in thickness may eused suees's'fullyi em 1e ,seerr ir a jgi;

r. ss'nommen, on NEW. irons, 1mm, essmzvoslmo AarsmcA-iv mm oom-PANY',iQE-NEW-'OBK N- 'Y-, CORPOEMION NEW JERSEY- braneiof thisdscrifition is characterized ey extreme lightness. and fleziibi'lity'and "opera es almost v'vithou't' ertia ofi crm-l 1 16- and is,therefore, an desirable material for "use in valve' actions. It avaisfound, hoi veve r thatlieat and cold and vari one conditions ofittIllOSPQIlC mo sture sometimes caused thematerial to stretchahdcontract tpa much greater extent than the materials'ordinarilynsedford'iaphragms. For n this reason" \vas ,foririd ,ina'dvisable to usesuch thin lriaterial lir ij "customary lihrag n in many valve i "j,Th'e'f ouch form of, aetuat'iig device illustrated provides a 'means.by Whichtlie man: brane previously"described eanbe success. i i iyse'dyf i l si i l epp i t; ems-- shrinkage ',or :ekpa si'on dan oceui'with- Out fle ting 0 m on ,of; the valve maits-guy; will be armr st,hqwavrj that theipoi chfor ii of actuatingdeviee may" e -flva ase sly fi i dfi fi iz io her ian t'h at speeifi c, lly'deisfcribed above.Qii'ite apart from the i nateria l of. Which the pouch isformje'd;the'IJoUehsha e is'fo und to operate .inoie quickly and surely than theusual diaphragm, even when for mediof the thicker mater al of which itcustomary to mal;e 'dmrhmem In order to hioldithe membrane tightly; a

pair of collars '12 and 13 have been provided between \vhichthe edgesfofthe pouch are h'el d, ,the whole structure being sunk into a reee'ss lftformed the board, 3. A small groove 15 is also formed in the board .3surrounding thec-ollar 1 l vhich1may he tilled mattered senate he d herelr 'mfr flpe an e e 'm e's i ip 'eveit mse- The (inter collar l3lm'ay beconveni en'tly made metahdvhile theiin ner maybe formed of Wood. Passagelfi is provided in the coljlafr through which atmospheric Kai 1' may beadmitted to ,tl epbucli 10 to actuate the valve t l ie usualmanner. Ableed l -7 is nrovided to maintain the bench and passage 1 6 ia n d thetube 18 to a tracker bar or other controlling devices normally underexhaust from the exhaust chest 1.

In assembling the structure described above, a, board 25 may be employedhaving a recess 26 formed therein of the same size as the recess 14formed in the board 3. The board 25 may also be provided with an opening 27' the purpose of Which will appear her inaftr; In assembling, one6f the 561mm 1.3

of thePtype described:is ceated on its inner sides with glue and placedin the recess 26 as illustrated in Figure 3 and the membrane 10 or othermaterial, ofwh'ich the" pouch is to beformed', is laid over therecess 26ontop of the board 25. Aboard 28 is then laid over the board With-itsconeshaped opening 29 overthc recess 26. The board 28 is held withsoine'pre'ssure so that when the mandrel 30 illustratedsinFigure A ispushed downwardly as illustrated in Figure 5, the n einbraneQWillbedrawn. evenly from all sides. vl ls av llbe apparent, this will resultin a foldingor crimping of the membrane as it is drawn through thecollar 13 and the ,ope'ningQZ. The mandrel may then beremoved and thecollar 12, which has previously been coated vith glucor shellac on itsouter side, may be pressed into the depression to hold the membranefirmly1in place. The assembled collars. and inemb rane may then beremovedfroin the, board 25 and is readyfor insertionjir the depression14 in the board 3 .after the surplus ends of the material have beentrimmed. I r

Theoperat ion ofthe device is similar to a valve action of tliestandardty e The chest 1 ismaintained rui derfsuitable,exhaust and the pouch l0and passages 16 and 18 arealso maintained under exhaust through thebleed 17. Since the pressui'es a re thusequalized, the valve 6 remainsin its lowered position as illustrated in Figure 1. If atmospheric airis admitted under v these conditions to the passage 18. from a trackerbarvor other mechanism, the pressures are unbalanced and the pouch 10 isinflated to-raisethe valve Gin the usual manner. As soon as the passage18 is closed to atmospheric air, the-pressures again become equalizedand;the valve- 6 dropsto its original positioln w 1 It isto beunderstood that the invention may be variously modified and embodiedwithin the scope of the's'ubjoined claims, -I claim as my invention 1.In a pneumatiovalve-action, in'co nbi- V tion, a valve, andmeans toactua'tesaidvalve, including a pouch of flexible material having a thicknessof less than" five ,'thousandths (S/100,0) of airinch.

nation, valve, and meansto actuate: said valve, including a member offlexible-niatcrial, a board to which said member is secured, said memberbeing folded above said board to forn'i a cap shaped pouch,- .thediameter of said member being substantially- -less at the point wheresecured tos aidboard than the diameter of said folded portion .abovetheboard. w i i H 1 pouch. p

ered portion.

tion, azvalve, .a pouch to actuate said valve, =2. 1a--;" "11 a board, apair of collars havlng diameters less than the. diameter of said:pouclrbetween which the edges of said poucli are held,

,boardbeing provided ivith recess into wh ch said ,c ollar s fit, andone ot sand collars and said board be ng provided with passages through\vlnchan' may a d nit-ted tosaid .)1ickered to a size s naller thanits-outside 1 of thin flexible material and'ffd'r iieddv'ith api-onouncedly constricted neck portion through which; air may}, beadmitted, and a bag portion ofsubstaiitially' greater diaineter thansaid neck port-ion. .1 a 6. A pouch for a pneumat v alve action formedof a sheet of thin 'fleziiblejinaterial having its edges puckeredportion of greater diameter than 'sa djpuck- J :1 Ii'iJ' 'I a 7. Themethod of making pneumat c valve pouches-from a sheet of flexiblernaterial which includes inserting the central portion of saidsheetthrough asubstaiitially cylindrical collar while frictionallyRestraining the edges thereof, w1thdraw1ngth fs insert ng means, andinserting a secoridcollar within the firstcollar to hold the pouchln'position.

, 8. In a pneumatic valve action, in combination, a valve, and means toactuate sa d valve, including a pouch of intestinal membrane having athickness of less than two t-housandths (2/1000) of an inch.

. I9., Ina pneumatic valve action, in'conibina- CHARLES F. sfTonnARn"

